[https://youtu.be/XfPZSJjs9vA] (YouTube link)Muffi... ...rself, and we are used to singers doing their own harmony in a technically seamless fashion. What Aoch did... ...the moment. The result is impressive, as his scat harmony steals the show from his melody. -via reddit

(YouTube link)There are 22 different Beatles songs in this medley. Can you catch them all? And even more remarkable, they are all performed by one guy -Grant Woolard, who brought us the National Anthem Mashup...

Brian Boyko admired the one-man four-part harmonies of YouTube member trudbol and the four-part one-woman harmonies of gwenatav. They both performed the song "Baby on Board" from the TV show The Simpsons. So in true geek...